this day in ancient times

Galileo gave Copernicus the heliocentric theory and insisted on defending his discovery in the opposition of the Church at the time.

On July 20 of 47 years ago, the mission crew of Apollo 11 set foot on the Moon, officially marking the first time humans conquered another object outside of Earth.

Inge Lehmann (May 13, 1888 - February 21, 1993) is a famous Danish seismologist. She is the one who has the ability to detect Earth's Inner Core.

March 24, 1959, equipment